This experiment was designed to determine the effects of sexual stimulation on plasma concentrations of oxytocin (OT),vasopressin (VP), 15-ketodihydro-PGF2a (PG-metabolite), luteinizing hormone (LH), testosterone (T), estrone sulfate (ES), andcortisol (C) in stallions. Semen samples were collected from 14 light horse stallions (Equus caballus) of proven fertility using aMissouri model artificial vagina. Blood samples were collected at 15, 12, 9, 6, and 3 min before estrous mare exposure, at erection,at ejaculation, and at 3, 6, and 9 min after ejaculation. Afterwards, blood sampling was performed every 10 min for the following60 min. Sexual activity determined an increase in plasma concentrations of OT, VP, C, PG-metabolite, and ES and caused nochanges in LH and T concentrations. The finding of a negative correlation between C and VP at erection, and between C and Tbefore erection and at the time of erection, could be explained by a possible inhibitory role exerted by C in the mechanism of sexualarousal described for men.[...]
Oxytocin, vasopressin, PGF2α, LH, testosterone, oestrone sulphate and cortisol plasma concentration after sexual stimulation in stallions
TOSI, UMBERTO;CARLUCCIO, Augusto
2010-01-01
Abstract
This experiment was designed to determine the effects of sexual stimulation on plasma concentrations of oxytocin (OT),vasopressin (VP), 15-ketodihydro-PGF2a (PG-metabolite), luteinizing hormone (LH), testosterone (T), estrone sulfate (ES), andcortisol (C) in stallions. Semen samples were collected from 14 light horse stallions (Equus caballus) of proven fertility using aMissouri model artificial vagina. Blood samples were collected at 15, 12, 9, 6, and 3 min before estrous mare exposure, at erection,at ejaculation, and at 3, 6, and 9 min after ejaculation. Afterwards, blood sampling was performed every 10 min for the following60 min. Sexual activity determined an increase in plasma concentrations of OT, VP, C, PG-metabolite, and ES and caused nochanges in LH and T concentrations. The finding of a negative correlation between C and VP at erection, and between C and Tbefore erection and at the time of erection, could be explained by a possible inhibitory role exerted by C in the mechanism of sexualarousal described for men.[...]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
